Purge Psyker

Choose an enemy psyker on the battlefield. Roll 2D6 and add your psyker mastery level. The target player does the same. The higher score wins. If the casting player wins, the enemy psyker loses 1 wound for each point of difference in the dice roll. If the enemy wins or it is a draw, nothing happens. If the enemy score is double the caster, suffer D6 wounds to the caster.